hi::v1::overlay_widget Class Reference

#include <hikogui/widgets/overlay_widget.hpp>

Inheritance diagram for hi::v1::overlay_widget:

Public Types
using	super = widget

Public Member Functions
	overlay_widget (gui_window &window, widget *parent) noexcept
	Constructs an empty overlay widget.
void	set_widget (std::unique_ptr< widget > new_widget) noexcept
template<typename Widget , typename... Args>
Widget &	make_widget (Args &&...args) noexcept
	Add a content widget directly to this overlay widget.
Public Member Functions inherited from hi::v1::widget
	widget (gui_window &window, widget *parent) noexcept
	widget (const widget &)=delete
widget &	operator= (const widget &)=delete
	widget (widget &&)=delete
widget &	operator= (widget &&)=delete
bool	is_gui_thread () const noexcept
hi::theme const &	theme () const noexcept
	Get the theme.
hi::font_book &	font_book () const noexcept
	Get the font book.
virtual hitbox	hitbox_test_from_parent (point3 position) const noexcept
	Call hitbox_test from a parent widget.
virtual hitbox	hitbox_test_from_parent (point3 position, hitbox sibling_hitbox) const noexcept
	Call hitbox_test from a parent widget.
virtual bool	accepts_keyboard_focus (keyboard_focus_group group) const noexcept
	Check if the widget will accept keyboard focus.
widget_constraints const &	constraints () const noexcept
widget_layout const &	layout () const noexcept
	Get the current layout for this widget.
virtual void	request_redraw () const noexcept
	Request the widget to be redrawn on the next frame.
void	request_relayout () const noexcept
	Request the window to be relayout on the next frame.
template<fixed_string SourceFile, int SourceLine, fixed_string Fmt, typename... Args>
void	request_reconstrain (Args &&...args) const noexcept
	Request the window to be reconstrain on the next frame.
template<fixed_string SourceFile, int SourceLine, fixed_string Fmt, typename... Args>
void	request_resize (Args &&...args) const noexcept
	Request the window to be resize based on the preferred size of the widgets.
virtual bool	handle_event (gui_event const &event) noexcept
	Handle command.
virtual bool	handle_event_recursive (gui_event const &event, std::vector< widget const * > const &reject_list=std::vector< widget const * >{}) noexcept
	Handle command recursive.
virtual widget const *	find_next_widget (widget const *current_keyboard_widget, keyboard_focus_group group, keyboard_focus_direction direction) const noexcept
	Find the next widget that handles keyboard focus.
widget const *	find_first_widget (keyboard_focus_group group) const noexcept
widget const *	find_last_widget (keyboard_focus_group group) const noexcept
bool	is_first (keyboard_focus_group group) const noexcept
	Is this widget the first widget in the parent container.
bool	is_last (keyboard_focus_group group) const noexcept
	Is this widget the last widget in the parent container.
void	scroll_to_show () noexcept
	Scroll to show the important part of the widget.
std::vector< widget const * >	parent_chain () const noexcept
	Get a list of parents of a given widget.
virtual color	focus_color () const noexcept
virtual color	accent_color () const noexcept
virtual color	label_color () const noexcept

Additional Inherited Members
Data Fields inherited from hi::v1::widget
gui_window &	window
	Convenient reference to the Window.
widget *const	parent
	Pointer to the parent widget.
std::string	id
	A name of widget, should be unique between siblings.
observer< widget_mode >	mode = widget_mode::enabled
	The widget mode.
observer< bool >	hover = false
	Mouse cursor is hovering over the widget.
observer< bool >	focus = false
	The widget has keyboard focus.
int	semantic_layer
	The draw layer of the widget.
int	logical_layer
	The logical layer of the widget.

Detailed Description

A GUI widget which may exist anywhere on a window overlaid above any other widget.

The overlay widget allows a content widget to be shown on top of other widgets in the window. It may be used for pop-up widgets, dialog boxes and sheets.

The size of the overlay widget is based on the widget::minimum_size(), widget::preferred_size() and widget::maximum_size(). Unlike other container widgets the clipping rectangle is made tightly around the container widget so that no drawing will happen outside of the overlay. The overlay itself will draw outside the clipping rectangle, for drawing a border and potentially a shadow.

As an overlay widget still confined to a window, like other widgets, when setting its layout parameters, it is recommended to use widget::make_overlay_rectangle() to make a rectangle that will fit inside the window.

It is recommended that the content of an overlay widget is a scroll widget so that when the overlay widget is drawn smaller than the requested rectangle the content will behave correctly.

Constructor & Destructor Documentation

overlay_widget()

hi::v1::overlay_widget::overlay_widget ( gui_window & window, widget * parent )

noexcept

Constructs an empty overlay widget.

Parameters

window	The window.
parent	The parent widget.

Member Function Documentation

make_widget()

template<typename Widget , typename... Args>

Widget & hi::v1::overlay_widget::make_widget ( Args &&... args )

inlinenoexcept

Add a content widget directly to this overlay widget.

This widget is added as the content widget.

Precondition

No content widgets have been added before.

Template Parameters

Widget

The type of the widget to be constructed.

Parameters

args	The arguments passed to the constructor of the widget.

Returns

A reference to the widget that was created.

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The documentation for this class was generated from the following file:

• hikogui/src/hikogui/widgets/overlay_widget.hpp